sillimaf



NITED STATES Arnnr trice..

HERBERT R. SlLLlll-IN, OF LYNN, MASSACHUSETTS, ASSIGNOR TO HIMSELF,ALONZO H. YVHITTEN, AND GEORGE W. LASCELL, OF SAME PLACE.

LAST- BLOCK FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 281,147, dated July l0,1883. v

Application filed March 31, 1882!. (No model.)

To alt 10.71.0111, it may con-cern: Be it known that I, HERBERT R.SILLIMAN, of Lynn, in the county of Essex and State of Massachusetts,have invented certain Improvements in Last-Block Fasteners, of which thefollowing is a specication.

This invention has for its object to provide simple and efficientlast-block fastening de- A vices, which shall serve also to protect thelast-s block and last from injury during the rough usage to which they'are subjected. To this end my invention consists in the improvementswhich I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification,Figure l represents a top view of a last having my improvedblockfastener. Fig. 2 represents a section on line .r x, Fig. l.

The same letters of reference indicate the saine parts in all the gures.

ln carrying out my invention, I attach rigidly to the upper end of thelast-block b a metal plate, c, which projects backwardly from the block,and is adapted to rest on the upper portion of the last at the rear ofthe block. The projecting portion of the plate c is provided with anorifice, c, adapted to coincide with the jackspindle socket d in thelast Zwhen the block is in place on the last. To the last I- attach by ascrew or screws, at e, a U-shaped spring, the body of which is containedin a vertical recess, le, in the last, while its free end projects abovethe upper surface ofthe last and is provided with an orifice, f, adaptedto receive a projection, g, on the rear end of the plate c. Above theorifice fthe free end of the spring e is bent backwardly, as shown inFig. 2.

' In fastening the last-block, a projection, i, on the lower or forwardend of the block is engaged with a recess in the last in the usualmanner, and the rear end of the plate c bears against the front side ofthe spring e, and displaces or presses the free end of said springbackwardly until the projection g snaps into the oricef, when the freeend of the spring resumes its normal position, so that the orifice fsurrounds the projection g and prevents lateral, vert-ical, orlongitudinal displacement of the block. The engagement of the lockingdevice or spring c with the plate c is entirely last.

automatic, the attendant having only to press the block downwardly toits bearing on the AWhen the block is to be released, a slight pressureon the rearwardly-bent end of the spring e removes the spring from theprojection y and releases the block. v

VIt will be seen that the plate c protects the thin upper end of theblock, and also, by surrounding the jack-spindle, prevents the last frommuch of the injury it usually receives from said spindle. The recess L'receiving the spring e prevents the latter from being displacedlaterally, and enables it to hold the plate c firmly, soV that theorifice c of said plate will not get out of line with the socket d.

l do not limit myself to the precise construction shown and described ofthe plate c and the automatic locking device therefor, as it is evidentthat the details thereof may be variously modified without departingfrom the spirit of my invention. The projection i at the forward endofthe last-block is, preferably, the rounded head of a screw inserted inthe block. A projection of this form wears the last less than a sharppoint or brad, such as has been used heretofore. The backwardly-projecting free end of the spring e is exposed, so that the operator canreadily press upon it to displace the spring and release the block I).

l claim l. A last-block fastener composed of a proj ecting plate aiixedto the exterior of the block, and provided with a projection, g, at itsrear end, and a yielding spring secured at one end to the rear portionof the last, and provided with a perforation or recess in its free end,said spring adapted to be displaced by said projection, and to receivethe latter into said recess when said projection and recess coincide, asset forth.

2. A lastblock having a rigidly-attached projection plate, c, projectingbackwardly therefrom, and provided with the jack-spindle orifice c',combined with the last having the spindle-socket d, coinciding with theoriiice c', and a spring-locking device, adapted to engage with theplate c, and prevent displacement of the block in any direction, andthereby keep the oriiice c in coincidence with the socket d, as setforth.

3. A last provided with a recess, 7:, extend- IOO ing downwardly fromits exposed upper surface at the heel, and a U-shaped spring containedin said recess, and having a perforated or recessed free end adapted toyield to and automatically engage with a projecting plate attached tothe last-block, as set forth.

4. A last provided with a recess, k, extending downwardly from itsexposed upper surface at the heel7 and a Ushaped spring contained insaid recess, having a perforated or recessed end adapted to engage witha projecting plate attached to the last-block, said free end beingextended backwardly to enable the spring to be disengaged from said projeotion, as set forth.

5. The combination of alast-block having' the projecting plate c,provided with the jackspindle orice c and projection g, and a lasthaving a U-shaped spring, e, set in a recess in the last, and providedwith a perforation 2o HERBERT R. SILLIMAN.

Witnesses:

GEO. W. LAsoELL, L. J. DAY.

